DISEASES OF PLANTS. 607 



affected, some so badly that the crop was ])ractically worthless. It is 

 demonstrated that leaving diseased roots on the ground or planting in 

 too rapid rotation will serve to inoculate the subsequent crop. 



It appeared from the foregoing experiment that some varieties were 

 more susceptible to the disease than others, and another experiment 

 with Achilles and Aberdeen Yellow turnips upon infected land showed 

 that the Achilles was the more resistant, producing more than twice as 

 many sound roots as the other variety. 



Legal enactments for the restriction of plant diseases, E. F. 

 Smith ( U. 8. Dept. Ayr., Division of Vegetable Physiology and Path- 

 ology Bui. llj pp. 45). — A compilation is given of the laws of the vari- 

 ous States of the United States and provinces of Canada relating to 

 tlie restriction of plant diseases. 



Twelve States are shown to have some sort of law for the prevention 

 of plant diseases, as follows: California, a general law; Connecticut, 

 peach yellows ; Delaware, peach yellows ; Kentucky, black knot of plum 

 and cherry; iMaryland, peach yellows; Michigan, peach yellows and 

 black knot of plum and cherry; New Jersey, for a cranberry disease, 

 and of general application under special conditions; Xew York, peach 

 yellows and black knot; Oregon, a general law; Pennsylvania, peach 

 yellows; Virginia, peach yellows; Washington, a general law. 



In addition to the foregoing the laws of Ontario and British Colum- 

 bia are given. 



Bacterid diseases of plants, V, E. F. Smith (Avier. Nat., 31 {1897), No. 361, pp. 

 34-41). — A review is given of the present state of our knowledge of bacteriosis of 

 hyacinths. 



A critical revie"w of the present state of our knowledge of bacterial diseases 

 of plants, VI, E. F. Smith {Amer. Nat., SI (1897), No. 362, pp. 123-138).— Tha present 

 paper deals with the gas-forming wet rot of the potato. 



Smut and bunt, F. Maddox {Agl. Gaz. Tasmania, 4 {1896), No. 6, pp. 92-95). 



A ne-w genus of Myxomycetes, E. Roze {Jour. Bot. France, 10 {1896), No. 24, pp. 

 424-426, fig. 1). — A new genus with 2 species is described — Amylotrogus discoideus and 

 A. ramiilosus. The organisms are said to attack the starch grains of the potato, 

 causing their destruction. 



Macrosporium solani, F. Fautrey {Rev. Mycol., 19 {1897), No. 73, p. 9). — The 

 author notes the occurrence of this fungus in the potato fields of France and sug- 

 gests the use of Bordeaux mixture for its prevention. 



The diseases of potatoes {Gard. Chron., ser. 3, 21 {1897), No. 523, pp. 12, 13). — 

 Popular notes are given of the more common potato diseases. 



Fungus diseases of sugar cane, C. Spegazzini {Rev. Facidiad. agron. y veterin. 

 La I'lata, 1896; ahs. in Rev. Mycol., 19 {1897), No. 73, p. 19). 



Peach rosette, E. E. Bogie (0/i7a/(oma Sta. Bui. 20, p. 21). — The presence of peach 

 rosette within the Territory is reported and the complete destruction of all diseased 

 trees is recommended. 



Peach yellows and black knot, A. D. Selry {Ohio Sta. Bui. 72, pp. 193-210, pi. 1, 

 figs. 5). — This bulletin, which was prepared with special reference to the require- 

 ments of a recent law relating to th(;se diseases, gives in popular form a clear and 

 concise statement of the present information relative to their cause, symptoms, and 

 suggested treatment. A supplement is added in which the text of the law is given. 



Nectria on currant canes, G. F. Atkinsox {Garden and ForeM, 10 {1897), No. 466, 

 p. 34). — Notes are given of an attack on currant canes due to Nectria cinnaharina and 

 rieoneciria berolinensw. 



